package com.whucs.eduservice.lisener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.whucs.eduservice.entity.EduSubject;
import com.whucs.eduservice.entity.excel.SubjectData;
import com.whucs.eduservice.service.EduSubjectService;
import com.whucs.servicebase.exceptionhandler.LuojiaException;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {
//listener不能交给spring管理，需要自己new，不能注入其他对象
    //不能实现数据库操作
    public EduSubjectService subjectService;
    public SubjectExcelListener() {

    }
    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
            if(subjectData==null){
                throw new LuojiaException(20001,"文件为空");
            }
            //添加一级分类
        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if(existOneSubject==null){//没有相同的一级分类就要进行添加
            existOneSubject=new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
   }
        //添加二级分类
        String pid=existOneSubject.getId();
        EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(), pid);
        if(existTwoSubject==null){
            existTwoSubject=new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);
        }



    }
    //判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");
        EduSubject  oneSubject= subjectService.getOne(wrapper);
        return oneSubject;
    }
    //判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject  twoSubject= subjectService.getOne(wrapper);
        return twoSubject;
    }
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
